Internal-combustion engine



June 9, 31925 E. R. BURTNETT INTERNAL COMBUSTION ENGINE Original Fileii Oct.

Patented June 9, 1925.

UNlTED STATES PATENT OFFICE.

EVERETTR. BUR'INETT, LOS ANGELES, CALIFORNIA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE AUTOMOTIVE VALVES 00., OF LOS ANGELES, CALI- FORNIA, A VOLUNTARY TRUST.

INTERNAL-COMBUSTION ENGINE.

Original application filed October 2, 1922, Serial No 591,761.

Divided and this application filed September 13, 1923. Serial No. 662,415.

To all whom it may concern:

Be it known that I,.Evr:nn'r'r R. BURT- NETT, a citizen of the United States, re siding at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Internal-Combustion Engines, of-

that controls the admission of gaseous fuel into the cylinder on which the head is located; to construct the head with an ignition chamber or pocket that is in direct communication with the port that is controlled by the gaseous fuel inlet valve; to provide the head with an integral portion that extends inavardly into the cylinder and cooperates with the latter in providing bear- 25 ings for the upper inner portion of the sleeve valve and, further, to form in said inwardly extending portion, an elongated tapered chamber that communicates directly with the ignition pocket and performs the functions of a charge compression, charge combustion, and expansion chamber. This application is a division of the application Serial No. 591,? 61 filed by me, October 2nd, 1922,, for internal combustion engines.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, that will be hereinafter more fully an engine cylinder, the upper portion of which is provided with a chamber 11, through which may be circulated, a suitable fluid cooling medium, preferably water. Arranged for reciprocatory movement within' said cylinder is a sleeve valve 12, and arranged for reciprocatory movement within the latter is a piston 13.

Secured in any suitable manner upon the head end of cylinder is ahead block 14 having a chamber 15 that is in communication'with chamber 11.

Formed integral with and projecting from block 14 into the chamber within cylinder 10, is a concentrically arranged. hollow, cylindrical head16, the external diameter of which is slightly less than the internal diameter of the chamber within said cylinder.

This arrangement provides a relatively narrow annular space between the cylinder wall and the outer wall of the head 16 and this space provides a working chamber for the upper portion of the sleeve valve 12.

Seated in the outer surface of the lower portion of head 16 is a relatively wide packing or junk ring or rings 18, the same serv-.

ing to provide a leak proof joint between the head and sleeve valve. Head 16 is formed withinner and outer walls that are spaced apart to form acooling fluid circu lating chamber 19 that communicates directly with chamber 15' and the inner wall of Said head is substantially bell shaped so that Seated in the central portion of block 14 directly above the pocket 21 is a cage 22 having a gaseous fuel inlet passageway, that is provided at its inner end with. a valve seat, and normally resting upon the latter is a spr n This in ct valve may be 0 erated 1n any suitable manner, preferably y means of a rocker arm 25 that is actuated by an eccentric controlled push rod 26.

Seated in block it to the side of the fuel held gaseous fuel inlet valve 24.

inlet valve, is a spark plug 27, the inner ends of the electrodes of which terminate within the ignition pocket 21. 1

It will be understood that the sleeve valve 12 controls the exhaust of products of combustion from the; piston clearance chamber and the subsequent admission of an inert volume of air or cooled products of combustion.

After the inert volume has been admitted to the piston clearance chamber, inlet'valve 24 is unseated to admit a precompressed charge of gaseous fuel and which latter is compressed in stratified relation within pocket 21 above the inert volume that is compressed within chamber 20, the compression of this Stratified charge, being effected by the upward stroke of piston 13. 7

As the piston passes high center or, immediately thereafter, the compressed gaseous fuel charge is ignited by a spark produced between the terminals of the electrodes of spark plug 27 and the force of the expanslon' resulting from combustion, passes downward through chamber 20 and impinges directly against the head of piston 13 to drive the same. downward on its power stroke.

Inasmuch as-the depending portion 16 of the head is rovided with a relatively large cooling filll circulation chamber 19, the heat resulting from the combustion of gaseous fuel within the pocket 21 and chamber 20 is rapidly disseminated.

My improved cylinder head is of relatively simple structure, may be easilyimachined, extends downwardly into the cylinder chamber so as to provide a bearing for the inner surface of the upper portion of the sleeve valve, 'and'as the ignition. pocket and the combined compression and combustion chamber are directly connected to each other and in directaxial alignment with the piston and piston clearance chamber, the efficieney of the engine is materially increased, due to the practically straight unrestricted sweep of the expansive power from the ignited charge,-into the clearance chamber and against the head of the piston therein.

Obviously, minor, changes in the size, I

form and construction of the various parts of my improved cylinder head may be made and substituted for those herein shown and described without departing from the spirit of the invention, the scope of whichis set forth in the appended claims.

I claim as my invention V 1. In an internal combustion engine, the combination, with a combustion cylinder and" a sleeve valve arranged for operation therein, of an inverted cylinder head secured to said cylinder and extending downwardly into the upper portion of said sleeve valve,

the lower portionof said cylinder head hav- 7 ing a compression clearance chamber, the lower portion of which gradually'enlarges to the same diameter as the internal diameter of the sleeve valve, the upper portion of said cylinder head having a charge localization pocket that communicates with the upper portion of the compression clearance chamber by a venturi passage, av centrally located poppet valve arranged in the upper portion of said head for admitting gaseous fuel into the charge localization chamber, and ignition means rojecting into said charge localiza tion'poc et,

2. In an internal combustion engine, the combination, with a combustion cylinder and a sleeve valve arranged for operation therein, of an inverted cylinder head secured to said cylinder and extending downwardly into the upper portion of said sleeve valve, the lower portion of said cylinder head having a compression clearance chamber, the lower portion of which gradually enlarges to thesame diameter as the internal diameter of the sleeve valve, the upper portion of said cylinder head havin a charge localization pocket that communicates with the upper portion of the compression clearance chamber by a venturi passage, a centrally located poppet valve arranged in the upper v localization chamber.

In testimony whereof I aflix my signature.

EVERETT n. BURTNETT. 

